Rich brioche is my winter time favorite (ja I eat it in summer too though 😂). Start baking in cold oven is new to me too. I think my mother put toast bread dough on 150 degrees and bring the temperature up to 200 degrees. I guess the dough raise somehow in the lower temperature in the oven before they form crust. I must try the method too.
I look forward to reading about your bread journey 🍞😊